Beaded strip of metal and the process of rolling the same



BEADED STRIP 0F METAL AND THE PROCESS OF ROLLING THE SAME.

APPLICATION FILED APR.14 1919.

1,843 53. e ed 1me 15, 1920; 2 SHhETS-SHEET l. V

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I APPLICATION FILED APR.14,1919| g 1,343,753. Patented June 15, 1920..

I 2 SHhETS-SHhE1L UNITED STATES PATENT OFFICE.

THOMAS SLOPER, OF DEVIZES, ENGLAND.

' BEADED STRIP F METAL AND THE PROCESS OF ROLLING THE SAME.

Specification of Letters Patent. Patented J une 15, 1920.

Application filed April 14, 1919. Serial No. 289,817.

To all whom it may concern:

. Be it known that I, THOMAS SLorEn, a subject of the King of England,residing at Devizes, Wiltshire, England, have invented certain new anduseful Improvements in Beaded Stri s of Metal. and Processes. of

A Rolling the ame, of which the following is a specification. v

This invention is for improvements in or relating to beaded strips ofmetal and to the process of rolling the same and is particularlyapplicable to the rims of wheels for aircraft where lightness is ofconsiderable importance, and which wheels are to receive pneumatictires.

It is common practice tothicken the edge of the over-turned lip whichengages the bead of the tire, b folding the edge of the metal strip fromW ich the rim is made over on to itselfthus maln'ng it of doublethickness at'the lips.

weight.

For this purpose it is necessary to employ steel which is very soft,otherwise it will crack where it is folded, and the thicker the metalthe more liableit is to crack.

The object of the present invention is to enable the edges of a strip tobe thickened without folding them back in this manner, so that a hardersteel can be employed and a stilfer rim or strip produced for a given.

It has before been proposedto provide a strip of steel for rim-makingwith thickened edges by hot rolling to produce a flat strip with thesaid thickened edges, but the strip so produced varies .more or less inwidth.

The process for producing a strip with thickened edges according to thisinvention consists'in (a) passing a flat strip between rollers to bendit into channel-form and .(b)

passing it between other rollers which the metal between them asarranged for making a wheel-rim strip;

Fig. 2 is a similar View of the second pair of operating-rolls;

3 is a simllar new of the third pair;

Fig. 4 is a similar view of the fourth pair rolls;

big. 5 shows a transverse section through a completed wheel-rim whereofthe thickened edges are constructed according to this of rolls for thesame strip, and 1 7.

Fig. 9 shows the completed strip flattened out.

The same letters indicate the same parts throughout the drawings.

The rolls for producing the thickened edges are of simple constructionas the required sha es can all be obtained by propl s.

erly-shape steps at the ends of the r0 In F 1g. 1, the upper roller Aenters the lower roller B and has an inclined-step at A the lower.rollerhas a-correspondingly inclined step. The metal strip 0 is thuskept fiat across the greater part of its width but is bent up at theedges providing an angle C The strip is assed from the rollers A B tothe rollers D shown in Fig. 2. In these rollers, not only an obliquestep D is provided, but also a vertical step D so that the metal C has asecond angle formed at C which brings the part that lies beyond theangle C into a perpendicular position relatively to. the main body ofthe strip.

In the third pair of rollers, the roller E which cooperates with theroller E is pro vided with steps E and E which lie at the same angles asthe steps I) D but the step E is shortened and widened, with the resultthat the metal at each edge of the strip 0 is crushed inward toward themain body of the metal and allowed to swell laterally outward providingthe thickened edges C In the fourth pair of rolls, this crushing iscarried a step farther, the rolls F and F providing a still shorter stepat F the width of the space provided by this step being still wider thanthe corresponding step in the rolls E E so that the edges of the strip Care still farther crushed inward and swelled laterally as shown at Cstill to give the same general form an Preferably the strip fortreatment accord ing to this process has sheared edges to insureuniformity in the width.

The further shaping of the rim may beeffected in known manner andconstitutes no part of the present invention. The complete rim is shownin Fig. 5, where the thickened edges C are shown bent inward to theposition they assume for receiving the tire. The rim shown is tied inlaterally by ties C to prevent outwarddisplacement of the edges underpneumatic pressure.

An important practical feature of the present invention lies in the factthat the edges of the rimwhich are to be crushed in are brought to sucha position that they lie radially to the axes of the rollers when theyare being crushed inward to thicken them.

Figs. 6 to 9 show the process and means 'for producing a fiat striphaving beaded or thickened edges, which edges are produced in the samemanner as already described by crushing the edges inward, this strip,however, being serviceable for. any desired purpose and not restrictedin its useto wheel'rims. The strip in this case is not bent angularly atany point but is bent into U-shaped channel-form, as shown in Fig. 6,the rollers G and G being shaped to give this form to the strip.

In Fig. 7, the rollers G and G are sha ed to fit the strip at all partsexcept at the edges H where space is allowed so that the edges arecrushed inward and spread laterally as shown in the figure.

In Fig. 8, the rollers G and G areshaped to still further crush theedges H The strip is then finished and can be made into any desired formor flattened out as shown 'at H Fig. 9, the flattening being effected bypassing it between other rollers as will be readil understood.

What claim as my invention and desire to secure by Letters Patent is 1.The method of forming a shape having a reinforced flange, comprising thesteps of rolling a blank and engaging the main portion of the bodythereof between the rolls of a roll pass to retain it against lateraldisplacement, and upsetting the edge of the blank in said pass toincrease the thickness thereof, substantially as described.

2. The'method of forming a metal shape having a reinforced flange,comprising the steps of rolling an angular blank and en gaing the mainportion of the body thereof between the rolls of a roll pass to retainit against lateral displacement, and. upsetting the edge of the blank toincrease the thickness thereof, substantially as described.

3. The method of forming a shape having reinforced flanges, comprisingthe steps of rolling a channel shaped blank and engaging the mainportion of the body thereof between the rolls of a roll pass to retainit against lateral displacement, and upsetting the edges of the blankwhile traveling through said pass to increase ,thethickness thereof,substantially as described.

4E. The method of producing thickened edges on a metal strip, which'comprises bendingthe strip into channel form having substantiallyvertical sides, tightly engaging said member throughout the main portionthereof while leaving a portion of the vertical sides free, and thenvertically upsetting the free portion of said sides to simultaneouslydecrease the height thereof and increase the thickness, substantially asdescribed.

In testimony whereof I aflix In si nature.

THOMAS LO EB.

